Steam fan-blower



(No Model.) 2 Sheets-Sheet 1. J. O. HBNDRY.

STEAM FAN BLOWER. No. 323,677. Patented Aug. 4, 1885.

(No Model.) 2 Sheets-Sheet 2.

J. 0. HENDRY. I

STEAM PAN BLOWER. No. 323,677. Patented Aug. 4, 1885 Q Q Jrv aflezvir N.PETERa PhowLiihcgmphar. Walhington, D. C

UNITED STATES PATENT Orrrcn,

JOHN G. HENDRY, OF BOSTON, MASSACHUSETTS.

STEAM FAN-BLOWER.

SPECIFICATION forming part of Letters Patent No. 323,677, dated August4, 1885.

Application filed July 5, 1884. (No model.)

To all whom it may concern:

Be it known that I, JOHN G. HENDRY, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Steam Fan-Blowers, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

My invention relates to a fan-blower of that class in which the fan andits actuating mech anism constitute a single piece of apparatus; and ithas forits object to makethe blower and engine more compact, efficient,and durable than those now in use. In most cases, when the actuatingengine and fan have common frame-work or constitute a single apparatus,the engine acts directly on the shaft of the fan, and in suchconstruction the speed of rotation of the fan is limited to the speedthat the engine-piston can attain, and it is necessary to have alarger-sized fan for a given capacity or to deliver a given amount ofair than it would be if there were no such limitation to the speed ofrotation of the fan. When belting or gearing has been employed toincrease the speed of the fan-shaft above that of the engine-shaft, thebelting has been a source of trouble on account of slipping, and gearingis noisy, and gives trouble on account of wear and resulting improperfitting.

My invention consists in the combination, with a base or frame-work, ofa case for the fan mounted on the said base, and with it constituting asingle frame-work, andan engine rigidly connected with the saidframe-work, so as to be securely held in definite position with relationto the fan, the said engine having an actuating-pulley in the same planewith the pulley on the fan-shaft and of larger diameter, and theblower-case having fastened upon it two intermediate pulleys or idlersover which the belt for transmitting movement from the engine-pulley tothe fan-pulley passes, for the purpose of giving increasedcontact-surface between the fan-pulley and belt in the wellknown manner.The 'idlers are preferably adjustable on the case or frame-work of theblower to facilitate the maintenance of the belt at the proper tension.

Figure 1 is a front elevation of a fan-blower embodying this invention,and Fig. 2 an end elevation thereof.

The blower-case a, having the outlet-opening in for the delivery of air,and inlet-opening c in its side, with a'bracket or pedestal, d, in thesaid opening constituting a bearing for the shaft 6 of the fan f, mayall be of suitable or usual construction, the said case being supportedon and rigidly connected with a bed or base, 9. The said base and thecase have rigidly connected with it a supporting-bracket, h, for anengine, 1', of usual construction, actuating a shaft, It, provided witha belt-pulley, m. The engine frame-work and blower-case or supportingframe-work for the fanshaft thus constitute a single member or framework rigid throughout, and there is no possibility of the shaft 16 andpulley m becoming displaced in relation to the fan-shaft c and pulley athereon, which pulley is in plane of the actu- 7o ating-pulley, m, andof smaller diameter, so that when the pulleys m a are connected byproper belting the latter runs at a higher speed than the former, theratio being preferably about two or three to one.

In order to give the connecting-belt 0 between the pulley m and n theproper amount of frictional contact with the said pulleys, so that itwill not require an excessive tension in order to operate withoutslipping, the said belt is carried over intermediate pulleys or idlers,p having their bearings in hangers r mounted upon plates t securelyfastened to the case a, so that the said idlers will also maintain theproper position with relation to the other pulleys. The hangers 1' areadjustable by means of the set-screws a, or equivalents, to enable thebelt 0 to be maintained at the proper tension, and when properlyadjustediare rigidly secured by bolts to, which 0 pass through-elongatedopenings for the hang v ers to admit of the adjustment.

In a fan-blower constructed as described the fan receives a high speedof rotation with a comparatively low piston speed in the engine, thusenabling an apparatus of much smaller size to deliver a given amount ofair than when the engine acts directly on the fan-shaft, and the speedof the latter is consequently limited to the speed that the engine canattain; but r00 the apparatus has all the advantages of one in which theengine acts directly on the fanshaft-namely, steadiness of operation,compactness and portability, with equal or in- 5 creased durability.

I claim The combination of the base and blowercase fixed thereon forminga single rigid framework, with the fan-shaft and attached pulley IO andactuating-engine fixed to the base with its pulley-shaft having itspulley below and in the same vertical plane with the fan-shaft pulleyand of greater diameter than said pulley, both the said shafts havingtheir hearings on JOHN C. HENDRY.

\Vitnesses:

Jos. P. LIVERMORE, W. H. SIcs'roN.

